Maybe you have not ever met anyone who would think that Mary is a deity. But I know a lot of Catholics, my cousins and many whom I evangelize to, clearly pray to Mary. And pray to her as mediator (or mediatrix), Queen of Heaven, immaculate of the immaculate, etc.
We don’t worship Mary. We ask her, instead, to pray for us. I think you are misinterpreting the actions of your relatives.
It’s not worship — it’s respect for the Mother of the Lord Jesus Christ.
Her last words in the Bible: “Do whatever he tells you.”
She defers everything to her Son, Jesus Christ!
Got it?